Su-25T Uncontrollable After Using Autopilot

[MonsterZero]

My Su-25T acquires a mind of its own after using the autopilot and develops rolls and oscillations after the autopilot is turned off. There is a persistent roll to the right. Also, I had problems raising/lowering the nose. No matter what I do, the plane won't fly straight and true.

 

I think I'm turning the autopilot off because the AP lights go out.

 

Any ideas?

[joey45]

Track?

[efa]

do not touch the handle when it deactivates the autopilot, otherwise it has insidence the trim is removed to 0 when the autopilot.

 

When this happens is alt +3 to activate your autopilot and does not touch the handle, and then disables your autopilot.

 

This is the solution I found

[159th_Viper]

My Su-25T acquires a mind of its own after using the autopilot and develops rolls and oscillations after the autopilot is turned off. There is a persistent roll to the right. Also, I had problems raising/lowering the nose. No matter what I do, the plane won't fly straight and true.

 

I think I'm turning the autopilot off because the AP lights go out.

 

Any ideas?

 

Disengage auto-pilot with Alt-9. A common mistake is to press A, thinking that disengages the AP - it does not.

 

As efa also stated, engaging the Emergency leveling mode is always a good habit to get into. It trims your aircraft quickly and easily.

[badger66]

Ive programed a button for transition to straight and level . No matter what attitude your at , pressing this will return the aircraft to straight and level ..... and trimmed out too ..... works every time .

[Weta43]

or press LCtrl + T after releasing the AP ...

[Dr_Arrow]

Just don't touch the stick when using autopilot. If you exert some force on the stick with autopilot on, autopilot will counter your input with trim. After you switch the autopilot off, trim will remain in position where the AP left it and you will end in untrimmed uncoordinated flight.

[Kameni]

You people sound confusing :D

When autopilot is engaged it trims the plane.

When you disengage autopilot - it does NOT return trims to default position, so you have to do it yourself. Ctrl+T does not work for Su25T.

 

Advice: Do not touch the stick too much, or the trim controls, while autopilot engaged.

Do not engage autopilot in low altitudes. Do not disengage autopilot in low altitudes.

And above all - try to use autopilot as less possible :P

[Weta43]

And above all - try to use autopilot as less possible

I disagree - it's there for a reason...

[Kameni]

I disagree - it's there for a reason...

 

When you learn to pilot a plane.

;)

Not before.

Agree? :)

 

EDIT: How will someone learn to fly if he uses autopilot from start?

How will he understand simple things as - flying economically, if he does not know how to do it?

 

Me, for example, use "lock altitude" occasionaly (when I go to toilet), and autopilot almost never.

I control my plane in a manner that is not tiring for me, neither boring as flying 200km on autopilot and reading a book (I'd fly FSX if I wanted to read a book and fly) - and the result is that I have come to know the behaviour of the plane pretty well. I trim the bird, take notice of thrust, flight elements.....I fly the plane. It is interesting way to some, boring to others, but people should really learn to fly before the stage where they use autopilot 80% of the time.

Just my 2¢.

Edited April 13, 2013 by Kameni

[efa]

Just don't touch the stick when using autopilot. If you exert some force on the stick with autopilot on, autopilot will counter your input with trim. After you switch the autopilot off, trim will remain in position where the AP left it and you will end in untrimmed uncoordinated flight.

 

A really good idea, I approve +1

[MonsterZero]

Thank you guys.

[Soulres]

Thank you guys.

Biggest issue i had with the SU25t Autopilot was that it acts up sometimes. wiether itll swerve from side to side, cradle up and down or just lock up. steps i do

 

Watch the FlightStick!!!

~couldnt say this more. only way to judge the trim is by where its at when you arnt putting any imput.

 

Watch the TrimLights!

~another important feature of when trims are Neutral. CTRL-T does NOT work 99.9% of the time.you have to recorrect by HAND.

[W1ndy]

Ive programed a button for transition to straight and level . No matter what attitude your at , pressing this will return the aircraft to straight and level ..... and trimmed out too ..... works every time .

 

This is an easy way to keep out of trouble. Level flight and then disengage auto pilot.

[maturin]

But really, is this realistic behavior?

 

It seems downright dangerous to have trim retained like that, and unnecessary when it's all controlled by computer anyways.

 

I'm more careful about not steering on autopilot than I am around AAA, and I still bump the stick now and then (which can crash you at low altitudes), or miss the hotkey (the indication lights are out of your field of vision when in ground attack mode). Don't tell me not to use autopilot, as the plan is designed to be flown that way, so you can maintain a steady dive while setting up the FCS for your workload-intensive Vikhrs.

[159th_Falcon]

Don't tell me not to use autopilot, as the plan is designed to be flown that way, so you can maintain a steady dive while setting up the FCS for your workload-intensive Vikhrs.

 

Wha?????? Workload intensive vikhrs? AP for Steady dive?

Someone's got a deathwish........

 

Aquire your targest from beyond 10 km, remember the area, extend to at least 15 km.

Line up and lock target whit skval, one your about 11 km away line up skval indicator and vikhr targeting circle, one you got LA launch.

 

No need for AP.

 

As for using the AP, here's some tips.

 

Don't make any inputs in the channels the AP is engaged on.

For example, make no pitch inputs if you in aLtitude hold mode.

Disengage AP before making ANY inputs in the channels its commanding.

 

And above all, NEVER use it in a dive, certainly no steep dives.

 

Low level use of AP is fine, just make sure to disengage it before taking control yourself again.

 

Really, the ONLY times the AP gives me trouble is when i mess things up myself. The AP of the SU25T is way better and more functional then that of the A10C to btw.

[PE_Tigar]

I disagree - it's there for a reason...

 

Come on, we're not flying in the coffin corner, and seldom have to fly straight and level for a long time... Trim it out properly, and there you go.

[Weta43]

It's like the Ka-50. The AP modes are there for the pilot to use.

People might prefer not to use them in sim - either because they feel more in control, or because they're not particularly proficient with them, but the various modes are there because the plane was designed with the intention that they be used.